Passenger Presence System Indicator Circuit Malfunction

Passenger Presence System Indicator Circuit Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

Circuit/System Description

The PASSENGER AIR BAG ON/OFF indicators are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the PPS module will commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are ON. If no malfunctions are detected, the PPS module will turn the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the PPS module will store a DTC, default the PPS to the OFF state, and communicate with the inflatable restraint sensing and diagnostic module (SDM) that a DTC has been set. The SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON to notify the driver of a malfunction.

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

SIR System Description and Operation (SIR System)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information.

Circuit/System Testing

Note: When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected:

* PPS
* PPS wiring harness
* IPC
* IPC wiring harness
* SDM
* SDM wiring harness

1. Ignition OFF, disconnect the harness connector at the inflatable restraint I/P module indicator.
2. Ignition OFF, test for less then 1 ohm between the ground circuit terminal 2 and ground.

• If greater then the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground.

• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the inflatable restraint passenger air bag On/Off indicator.

4. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.

• If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the IPC.

5. Connect a test lamp between the control circuit terminal 1 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.

• If the test lamp is always on, test the control circuit for a short to ground. If all circuits test normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the IPC.

6. If all circuits test normal, replace the inflatable restraint I/P module indicator.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Inflatable Restraint Instrument Panel Module Indicator Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for IPC and SDM replacement, setup, and programming